Micro-Aide LDM-1 plug-in, User Manual

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Setup and Installation - Setup
13
Figure 5 illustrates the location of each setting on the LDM-1 PCB.
S
ETUP
In the sections that follow a description is provided for each jumper and
switch setting. A description of how to permanently assert the modem’s RTS
signal is also provided.
R
CV AND
X
MT
T
ERMINATIONS
(AX1
AND
AX2)
AX1 and AX2 allow the user to select either a 150Ohm (On) or high imped-
ance (Off) termination. These jumpers are used in accordance with the fol-
lowing rules.
• The AX1 (Rcv) and AX2 (Xmt) settings must always match each other.
• Irrespective of the type of network, always terminate the extreme ends of
the network (i.e., the near and far ends).
N
OTE
: The factory default switch and jumper settings for AX1 through AX5
and SW2 are satisfactory for use with a point-to-point network. The Equal-
ization setting controlled by SW3 may need to be changed as required by the
length of cable being used.
Figure 5 - LDM-1 PCB